Prisoner seat security device

ABSTRACT

A device to restrain a prisoner has a nylon strap attached to a spring-loaded spool, which the operator attaches by means of a clasp to the prisoner&#39;s handcuffs or restraining apparatus, and the nylon strap automatically retracts through the seat into the spool&#39;s housing located behind the seat as the prisoner sits down. When the prisoner is seated against the seatback, the law enforcement officer activates a remote-control locking switch, which causes a 12-volt braking mechanism to engage and prevent the nylon strap from being pulled out, which holds the prisoner securely in place against the seat and prevents him/her from being able to move enough to release a seatbelt or unlock and open a vehicle door. When the officer is ready to remove the prisoner, he/she again activates the remote-controlled switch which releases the brake and allows the nylon strap to be extracted while the prisoner steps away from the seat.

BACKGROUND OF THE INVENTION

Law enforcement, corrections, security and military personnel transport handcuffed or otherwise fettered prisoners in various vehicles from one location to another. Traditionally, a police officer arrests a suspect and places him/her into handcuffs. The prisoner is then placed in the police vehicle, which is often equipped with an aftermarket cage that prevents the suspect from exiting the back seat compartment. The cage requires hard installation to the vehicle and prevents the rear passenger compartment from being utilized for other purposes. Many officers and departments forego the use of a cage and place the handcuffed prisoner in the front passenger seat and then only use a seatbelt to them. This practice can allow intent prisoners to move around freely enough to unlatch the seatbelt, unlock and open the vehicle's door to escape, and in some circumstances to move the handcuffs from behind the back to the front, which facilitates a possible assault on the officer or unlawful operation of the police vehicle.

SUMMARY OF THE INVENTION

The preferred application of this invention incorporates a mounting apparatus that hangs over the back of a front passenger side vehicle seat and is fastened to the seat. Towards the bottom of the mounting apparatus is attached a housing which contains a spring-loaded spool, wrapped with a nylon strap that can be rendered locked in place by means of a electronic braking device which is operated by a remote switch.

The nylon strap exits the housing and travels through the vehicle seat to the front. The spool is in its inactive mode, which allows the strap to be extracted freely. The police officer (operator) walks a handcuffed or similarly fettered prisoner to the front passenger door of his police vehicle. He then attaches the retractable nylon strap to the chain between the handcuffs by means of a clasp. The suspect then sits down into the seat as the nylon strap self retracts into its housing through the seat. When the suspect is seated against the seatback, the operator activates a remote-controlled switch which causes a 12-volt current to engage the spool's braking mechanism and preventing the nylon strap from again being extracted. This action holds the prisoner's body and hands in place against the seat and prevents him/her from being able to move sufficiently enough to unlatch the seatbelt, unlock and open the door, or move their handcuffs to the front. This prevents their ability to assault the officer or operate the police vehicle.

By having the prisoner secured in such a manner, the police officer can then go about his other necessary duties which may include: dealing with other suspects, searching or inventorying a vehicle, talking with victims and witnesses. When a lone officer has more than one suspect, this device allows him the ability to secure multiple prisoners in his vehicle while preventing their ability to move sufficiently to physically interact with each other.

After concluding his on-scene duties, the officer is able to transport the prisoner from the scene to the police station or correctional facility for processing, knowing that the prisoner is secure and unable to make hazardous movements. After transport, the officer opens the prisoner's door and releases the electronic brake by means of the remote-controlled switch. The prisoner is directed to stand up and exit out of the vehicle. The officer can then unhook the nylon strap and escort the prisoner into the facility.

The prime innovation of this invention is that it provides a retractable and locking device specifically designed to secure a handcuffed prisoner in place against a vehicle seat. This action prevents the prisoner from being able to move his hands and body sufficiently enough to release a seatbelt latch or unlock and open a door. This further prevents the prisoner from being able to move the handcuffs from back to front. The invention requires no major modification to the vehicle and it is relatively portable allowing for it to be removed and reinstalled into another vehicle.

Its design utilizes the installation behind the seat to combat the force that a prisoner could possibly exert in order to defeat the locked secure position of the nylon strap. As the prisoner pulls against the strap, it is additionally being reinforced by its position behind the seat.

Some additional advantages to the use of this invention are:

It causes minimal damage to a vehicle as a result of installation, and thus increases the vehicle resale value.

It can be easily moved from one vehicle and reinstalled into another.

It has a low profile design which allows the seat to still be utilized for non-prisoner passengers.

The low profile design and simplicity of use are less likely to create anxiety by the prisoner.

It provides an alternative to the use of a police cage.

In cases of emergency the transporting officer can release the prisoner by activating the remote switch. Additionally, the nylon strap can be cut with a knife or scissors to facilitate a quick release.

The brake for the spool containing the nylon strap is in a locked position when a 12-volt current is supplied to it by activation of the officer's remote-controlled switch. Should that current from the vehicle's battery be disrupted due to a collision, the brake disengages and the strap may be extracted allowing for the prisoner to exit the vehicle.

The device is used in conjunction with the use of the vehicle's seatbelts. It does not interfere with the normal operation of a vehicle's seatbelt.

THE DRAWINGS

A preferred embodiment of the invention is illustrated in the accompanying drawings in which:

FIG. 1, is a view of the retractable restraint shown without a mounting system.

FIG. 2, is a cross section view of the device showing the inner workings and components. Again, without a mounting system.

FIG. 3, is a side view of a patrol car with the retractable restraint mounted to the backside of the front passenger seat. The restraint strap passes through the gap between the bottom of the seat and the seat back and attaches to the prisoner's handcuffs.

FIG. 4, is a rear view of the retractable restraint in use on the front passenger seat as shown in FIG. 3.

DETAILED DESCRIPTION OF THE INVENTION

The retractable restraint device as shown in FIG. 2 consists of a case assembly (FIG. 2(1)); electromagnetic brake (FIG. 2(2 a, b)); strap assembly (FIG. 2(3)); sealed bearing assemblies (FIG. 2(4 a, b)); shaft and spool assembly (FIG. 2(5)); return spring (FIG. 2(6)); and restraint strap (FIG. 2(3)).

The free end of the restraint strap (FIG. 2(3)) is allowed to pass from the case assembly (FIG. 2(1)) through an opening cut into the case assembly (FIG. 2(1)). The free end of the restraint strap (FIG. 2(3)) is intended to have a clasp or hook to attach to the restrained prisoner's handcuffs.

The restraint strap (FIG. 2(3)) is wound on the shaft and spool assembly (FIG. 2(5)) which is kept in a state of tension by return spring (FIG. 2(6)). This provides for the retraction of the restraint strap (FIG. 2(3)) when the invention is in the inactive mode. The shaft and spool assembly rides on the two bearing assemblies (FIG. 2(4 a, b)) to allow free movement of the shaft in either direction when the invention is in the inactive mode.

The electromagnetic brake assembly (FIG. 2(2 a, b)) is a two-piece device consisting of an electromagnet (FIG. 2(2 b)) that is attached to the case assembly (FIG. 2(1)). The second part of the electromagnetic brake assembly (FIG. 2(2 a)) is attached to the shaft with a set-screw and rotates with the shaft without interference from electromagnet (FIG. 2(2 b)) while the invention is in the inactive mode.

When voltage is applied (active mode) to the electromagnetic brake assembly (FIG. 2(2 a, b)), part (FIG. 2(2 b)) produces an electromagnetic force that pulls the friction material of electromagnetic brake assembly (FIG. 2(2 a)) into physical contact with electromagnetic brake assembly part (FIG. 2(2 b)). This binds the electromagnetic brake assembly (FIG. 2(2 a)) which is attached to the shaft and spool assembly (FIG. 2(5)) to the electromagnetic brake assembly (FIG. 2(2 b)) which is attached to the case assembly (FIG. 2(1)). This renders the shaft and spool assembly (FIG. 2(5)) locked and immoveable preventing the strap assembly (FIG. 2(3)) from being pulled out of the case assembly (FIG. 2(1)).

As shown in FIG. 3, the retractable restraint (FIG. 1(1)) is mounted (FIG. 3(3)) to the backside of the front passenger seat. The strap assembly (FIG. 3(2)) is passed through the gap between the seat back and the seat bottom and attached to the prisoner's handcuffs.

FIG. 4 shows the same example from a rear view.

When the retractable restraint described in this invention is used to restrain a prisoner in the front seat of a law enforcement vehicle, the following procedure would be followed. The prisoner would be escorted to the open door of the vehicle. The strap assembly could either be simply lying on the seat and would need to be pulled out by the officer to hook to the handcuffs of the prisoner, or the strap assembly could be attached to the inside of the vehicle door with a hook-type device. This would allow the strap to be pulled out when opening the door allowing easy access. Since the invention is retractable, the strap would move in and out with the opening and closing of the door. In either case, the strap assembly would be attached to the handcuff of the prisoner, and the prisoner allowed to sit down in the seat. The retractable restraint would retract the excess strap as the prisoner sits down. Once the prisoner is seated, the officer would activate the retractable restraint. (This could be accomplished in any number of ways, including RF remote control, dash-mounted switch, or possibly a switch mounted on the rear of the device, out of the prisoner's reach.) Once the retractable restraint is activated, the electromagnetic brake would lock the shaft and spool assembly and the prisoner would be unable to exit the seat. Since, in most cases, the prisoner's knees would be higher in elevation than his hips, he would be at an anatomical disadvantage with respect to body leverage and would be less likely to overcome the strength of the electromagnetic brake assembly.

Upon arrival at a detention facility, the officer could remove the prisoner from the vehicle by deactivating the retractable restraint, thus freeing the shaft and spool assembly and allowing it to rotate freely. The prisoner could then exit the vehicle, pulling a length of strap assembly out as he/she stands up. The strap assembly would then be allowed to either retract back into the device, or be attached to the door as outlined above, making it ready for the next use.

By default, the retractable restraint is in an inactive state, meaning that as long as voltage is not applied to the electromagnetic brake assembly, the strap assembly is free to be pulled out of, or retract into, the device. This was a safety consideration in the design of the device. Since in the event of a mishap such as an accident, rollover or fire, power would most likely not be available to keep the device activated. A position sensor such as a mercury switch could be incorporated into the design to ensure that the device is only capable of being activated in an upright position.

The retractable restraint could be used in a variety of different applications including, but not limited to, restraining a prisoner in a courtroom, the back seat of a vehicle, or used with K9 Units. 

1. A seat restraining device comprising in combination: a. a housing for attachment to the floor of a motor vehicle, said motor vehicle having one or more seats therein; b. a spring-loaded spool secured in said housing with mechanized means for rotating the spool; c. a retractable restraining strap means secured at one end thereof to said spring-loaded spool, said restraining strap means adapted to be extended through an aperture between a seat back and seat bottom of a seat in said motor vehicle, with the opposite end thereof adapted to be attached to fetters secured to a person seated in said seat; d. a braking mechanism attached to said spring-loaded spool for controlling the rotation of the spool and preventing the extension of said strap means; and e. a remote controlled switch for controlling the operation of said mechanized means for rotating said spool.
 2. A restraining device as set forth in claim 1, wherein said mechanized means for rotating said spring-loaded spool comprises a 12-volt motor.
 3. A restraining device as set forth in claim 1, wherein said strap means is a nylon strap having a clip on one end thereof for attaching to the fetters or a person.
 4. A restraining device as set forth in claim 1, wherein said housing is removable for installation in another motor vehicle.
 5. A restraining device as set forth in claim 1, wherein said housing is adapted to be attached to a substrate and wherein said strap is adapted to be extended through a conventional chair. 